Wild speculation: but perhaps this is just a classpath issue. Perhaps the on the fly compiler used by Jetty (and Tomcat in the case of the URL i sent earlier) tries to build a complete list of resources available from every item in the classpath before compiling JSPs, and in your case these dylib files are mistakenly in your classpath.
In any event, i'm guessing that if you tried to run Jetty without Solr and load up a simple hellowworld.jsp you'd get the same problem. You may want to try installing Tomcat to see if you get same problem with it. (trying a hellowworld.jsp before trying Solr) you know what ... i think this is definitely it. This TomCat bug claims it's a bug in the Apple J2SE 5.0 which has been fixed (look at comment #10) ... http://issues.apache.org/bugzilla/show_bug.cgi?id=34856 -Hoss
